Iridescence is a lustrous rainbow-like play of color that tends to change as the angle of view changes. Think soap bubbles. Iridescent glass tiles reflect light and create a focal point, providing an engaging design aesthetic. The Iridescent collection of glass mosaic tiles can be used in many applications. This sensational glass tile collection features nine designs in different color blends. Customer testimonial: They look very nice on the wall as a backsplash.